#nodejs

Every week, the cyber world reminds us that silence doesn’t mean safety. Attacks often begin quietly — one unpatched flaw, one overlooked credential, one backup left unencrypted. By the time alarms sound, the damage is done. This week’s edition looks at how attackers are changing the game — linking different flaws, working together across borders, and even turning trusted tools into weapons.

# Escape of VM Context gives access to process level functionality ## Summary Happy DOM v19 and lower contains a security vulnerability that puts the owner system at the risk of RCE (Remote Code Execution) attacks. A Node.js VM Context is not an isolated environment, and if the user runs untrusted JavaScript code within the Happy DOM VM Context, it may escape the VM and get access to process level functionality. What the attacker can get control over depends on if the process is using ESM or CommonJS. With CommonJS the attacker can get hold of the `require()` function to import modules. Happy DOM has JavaScript evaluation enabled by default. This may not be obvious to the consumer of Happy DOM and can potentially put the user at risk if untrusted code is executed within the environment. ## Reproduce ### CommonJS (Possible to get hold of require) ```javascript const { Window } = require('happy-dom'); const window = new Window({ console }); window.document.write(` <script> ...

### Summary When running Astro in on-demand rendering mode using a adapter such as the node adapter it is possible to maliciously send an `X-Forwarded-Host` header that is reflected when using the recommended `Astro.url` property as there is no validation that the value is safe. ### Details Astro reflects the value in `X-Forwarded-Host` in output when using `Astro.url` without any validation. It is common for web servers such as nginx to route requests via the `Host` header, and forward on other request headers. As such as malicious request can be sent with both a `Host` header and an `X-Forwarded-Host` header where the values do not match and the `X-Forwarded-Host` header is malicious. Astro will then return the malicious value. This could result in any usages of the `Astro.url` value in code being manipulated by a request. For example if a user follows guidance and uses `Astro.url` for a canonical link the canonical link can be manipulated to another site. It is not impossible to...

Fortinet warns of Stealit, a MaaS infostealer, now targeting Windows systems and evading detection by using Node.js’s SEA feature while hiding in fake game and VPN installers.

Cybersecurity researchers have disclosed details of an active malware campaign called Stealit that has leveraged Node.js' Single Executable Application (SEA) feature as a way to distribute its payloads. According to Fortinet FortiGuard Labs, select iterations have also employed the open-source Electron framework to deliver the malware. It's assessed that the malware is being propagated through

Cybersecurity researchers have flagged a new set of 175 malicious packages on the npm registry that have been used to facilitate credential harvesting attacks as part of an unusual campaign. The packages have been collectively downloaded 26,000 times, acting as an infrastructure for a widespread phishing campaign codenamed Beamglea targeting more than 135 industrial, technology, and energy

Cisco Talos has confirmed that ransomware operators are leveraging Velociraptor, an open-source digital forensics and incident response (DFIR) tool that had not previously been definitively tied to ransomware incidents.   We assess with moderate confidence that this activity can be attributed to threat actor Storm-2603, based on overlapping tools

### Summary A file upload vulnerability in FlowiseAI allows authenticated users to upload arbitrary files without proper validation. This enables attackers to persistently store malicious Node.js web shells on the server, potentially leading to Remote Code Execution (RCE). ### Details The system fails to validate file extensions, MIME types, or file content during uploads. As a result, malicious scripts such as Node.js-based web shells can be uploaded and stored persistently on the server. These shells expose HTTP endpoints capable of executing arbitrary commands if triggered. The uploaded shell does not automatically execute, but its presence allows future exploitation via administrator error or chained vulnerabilities. #### Taint Flow - **Taint 01: Route Registration** `POST` file requests are routed to the controller via Multer https://github.com/FlowiseAI/Flowise/blob/d29db16bfcf9a4be8febc3d19d52263e8c3d0055/packages/server/src/routes/attachments/index.ts#L8 - **Taint ...

One click, total mess. A convincing itch-style page can drop a stealthy stager instead of a game. Here’s how to spot it and what to do if you clicked.

### Summary The web UI for SillyTavern is susceptible to DNS rebinding, allowing attackers to perform actions like install malicious extensions, read chats, inject arbitrary HTML for phishing, etc. ### Details DNS rebinding is a method to bypass the CORS policies by tricking the browser into resolving something like `127.0.0.1` for a site's DNS address. This allows anybody to get remote access to anyone's SillyTavern instance **without** it being exposed, just by visiting a website. ### PoC 1. Host the PoC HTML file on a `/rebind.html` endpoint (or any other endpoint) on a web server on port 8000 2. Go to https://lock.cmpxchg8b.com/rebinder.html and input your IP address (A) to rebind to 127.0.0.1 (B) 3. Replace the URL in the HTML with the returned URL on the site 4. Go to `http://[URL]:8000/rebind.html` in firefox or on any mobile browser if you're using termux 5. Check the developer tools console. It should return all of the data Here is the PoC code: ```html <!DOCTYPE html> <...